See: http://www.democraticunderground.com/12511117608

And don't even get me started on the Roosevelt High school Polk County results. There was election fraud documented by CSPAN. The Clinton precinct chair perjured herself on national TV. Shameful.

A 4-5 delegate difference on the county level is not going to translate at the state level. It'll be a tie, split, etc. 22 state delegates each.

and you're "in like Flynn!"

Easy-peasy.

or was the impact of the coin flips something smaller than that?

according to this it was precincts.
http://theweek.com/speedreads/602890/hillary-clinton-wins-iowa-precinct-by-coin-toss

but it is hard to understand the whole caucus scoring system

There are 1,385 precinct delegates (there are a bit more precincts than that but a few hundred caucus together).

Clinton is winning by 4 of the 1,385 precinct delegates, 6 of which she won by coin toss.

The precinct delegates go on to vote for the state delegates (who go to the National Convention). This will result in a 22/22 split between the two campaigners. It's not a big deal. But people are making it out to be.